CN102186288A - Intelligent LED (Light Emitting Diode) driving chip - Google Patents
Intelligent LED (Light Emitting Diode) driving chip Download PDFInfo
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- CN102186288A CN102186288A CN2011100884117A CN201110088411A CN102186288A CN 102186288 A CN102186288 A CN 102186288A CN 2011100884117 A CN2011100884117 A CN 2011100884117A CN 201110088411 A CN201110088411 A CN 201110088411A CN 102186288 A CN102186288 A CN 102186288A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The invention discloses an intelligent LED (Light Emitting Diode) driving chip which comprises a detection unit, a processing unit, a voltage conversion unit and a driving unit, wherein the detection unit is connected with respective LEDs through respective connecting passageways and is used for automatically detecting actual voltage data of the respective LEDs and feeding the actual voltage data back to the processing unit; the processing unit is used for computing the number of the respective LEDs connected in series with the respective connecting passageways and the amplitude of voltage needed to be adjusted according to the actual voltage data, generating adjusted output voltage data of the respective connecting passageways, and sending the adjusted output voltage data to the voltage conversion unit; and the voltage conversion unit is arranged to input signal data including voltage information, convert a voltage of the signal data input by a data input port according to the adjusted output voltage data, and send the voltage-converted signal data to the driving unit to drive the respective LEDs. In the invention, an output voltage of the intelligent LED driving chip can be adjusted automatically according to the number and the connection means of driven LEDs so as to be consistent with driving voltages of the respective LEDs.
Description
Technical field
The present invention relates to the Driving technique of lighting device, particularly relate to a kind of intelligent LED chip for driving.
Background technology
Stage now, pursue in the whole world healthy, environmental protection pressure, under the great situation of energy crisis, semiconductor lighting by universally acknowledged be a kind of important channel of health energy-saving environment protective, expand its range of application just at faster speed.
In the prior art, the LED chip for driving all is to adopt constant-current driving or constant voltage driving setting, and the output voltage of LED chip for driving or output current are constant output, but because each series LED quantity that the LED chip for driving is driven is inequality, and, when a plurality of LED of series connection, there is circuit loss in series circuit, makes the LED brownout of series connection back easily, can not light, if series voltage is less, but driving voltage is excessive, and LED is burnt out.
Therefore, there is defective in prior art, needs to improve.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of and can adjust its output voltage automatically according to the quantity of driving LED and the connected mode of each LED, the intelligent LED chip for driving that its output voltage is consistent with the driving voltage of each LED of driving.
Technical scheme of the present invention is as follows: a kind of intelligent LED chip for driving wherein, comprises detecting unit, processing unit, voltage conversion unit and driver element; Described detecting unit is connected with each LED by at least one interface channel, is used for detecting automatically the virtual voltage data of each each LED of interface channel, and feeds back to described processing unit; Described processing unit is according to described virtual voltage data, calculates the quantity of each LED of each interface channel series connection and the amplitude of required adjustment voltage, generates the adjustment output voltage data of each interface channel, and sends to described voltage conversion unit; Described voltage conversion unit is provided with at least one data-in port, is used for input signal data, wherein comprises information of voltage; Described voltage conversion unit is according to described adjustment output voltage data, changes the voltage of the signal data that described data-in port imports, and the described signal data behind the changing voltage is sent to described driver element; Described driver element drives each LED by each interface channel.
Be applied to technique scheme, in the described intelligent LED chip for driving, comprise that also one pre-sets the unit, be connected, be used to pre-set the minimum voltage of each LED with described processing unit.
Be applied to above-mentioned each technical scheme, in the described intelligent LED chip for driving, described detecting unit is connected with each LED of outside at least one catenation sequence by at least one interface channel, be used for detecting automatically the virtual voltage data of each each LED of catenation sequence, and feed back to described processing unit according to the order of connection.
Be applied to above-mentioned each technical scheme, in the described intelligent LED chip for driving, described interface channel comprises red LED interface channel, green LED interface channel and blue led interface channel, respectively by connection line and corresponding LED connection of all kinds.
Be applied to above-mentioned each technical scheme, in the described intelligent LED chip for driving, described voltage conversion unit comprises a step-down conversion subelement, a boost conversion subelement and a switch subelement, be used for according to described adjustment output voltage data, start described step-down conversion subelement or described boost conversion subelement.
Be applied to above-mentioned each technical scheme, in the described intelligent LED chip for driving, described processing unit also is provided with a fault output subelement and a judgment sub-unit; Described judgment sub-unit is used for when described virtual voltage data exceed preset limit value, starts described fault output subelement, and the error message of transmitting described virtual voltage data is to described fault output subelement; Described fault output subelement is used for the error message according to described virtual voltage data, generates fault data and output.
Be applied to above-mentioned each technical scheme, in the described intelligent LED chip for driving, described processing unit also is provided with a feedback output end mouth, is used for exporting the described virtual voltage data that show each each LED of interface channel.
Be applied to above-mentioned each technical scheme, in the described intelligent LED chip for driving, memory cell and PWM control unit be set also; Described memory cell is used to store described preset limit value, described adjustment output voltage data, described signal data; The described signal data of described PWM control unit after according to changing voltage generates pwm signal, drives each LED by described driver element by each interface channel.
Be applied to above-mentioned each technical scheme, in the described intelligent LED chip for driving, the cascade codec unit also is set, be used for an intelligent LED chip for driving and next intelligent LED chip for driving in the cascade, intercept the described input signal data that it needs, remaining input signal data is sent to next intelligent LED chip for driving.
Be applied to above-mentioned each technical scheme, in the described intelligent LED chip for driving, described intelligent LED chip for driving is the redundancy fault-tolerant chip for driving, and it comprises at least two data-in ports, and each data-in port is redundant each other to be provided with.
Adopt such scheme, the present invention is by being provided with the virtual voltage data that described detecting unit detects each LED in each interface channel automatically, and feeds back to described processing unit; According to described virtual voltage data, calculate the quantity of each LED of each interface channel series connection and the amplitude of required adjustment voltage by described processing unit, generate the adjustment output voltage data of each interface channel, and send to described voltage conversion unit; Again by described voltage conversion unit according to described adjustment output voltage data, change the voltage of the signal data that described data-in port imports; And drive each LED by the driver element that is provided with and with the described signal data behind the changing voltage; The LED quantity that its output voltage can be connected with each interface channel, with and the needed driving voltage in position of series connection conform to, thereby make each LED operate as normal under its minimum drive voltage, electric energy damages minimum, and, can show according to pre-seting brightness.
Description of drawings
Fig. 1 is a kind of schematic diagram of the specific embodiment of the invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
As shown in Figure 1, present embodiment provides a kind of intelligent LED chip for driving, described intelligent LED chip for driving can be according to the quantity of the LED of all kinds of its driving, automatically adjust its output voltage, can under normal minimum voltage, light with the LED of all kinds that guarantees its driving, thereby carry out work according to default brightness.
Wherein, described intelligent LED chip for driving comprises interconnective detecting unit, processing unit, voltage conversion unit and driver element.
Described detecting unit is connected with each LED by one or more interface channels, promptly be connected with each LED by one or more driver circuit, and, each LED that is connected with each interface channel is connected in series respectively, described detecting unit can be used for detecting automatically the virtual voltage data of each each LED of interface channel, and its detected described virtual voltage data are fed back to described processing unit; Described detecting unit has the function of real-time detection, can be used for the virtual voltage data of each each LED of interface channel of real time automatic detection, and its detected described virtual voltage data in real time is fed back to described processing unit.
For example, described interface channel can comprise red LED interface channel, green LED interface channel and blue led interface channel, wherein, described red LED interface channel is connected with one or more red LED, described green LED interface channel is connected with one or more green LED, and described blue led interface channel is connected with one or more blue leds; Described detecting unit is used for detecting respectively the virtual voltage data of each blue led of the virtual voltage data of each green LED of virtual voltage data, green LED interface channel of each red LED of red LED interface channel and blue led interface channel, and feeds back to described processing unit respectively.
And for example, described detecting unit is connected by each LED of the one or more catenation sequence in one or more interface channels and outside, be used for detecting automatically the virtual voltage data of each each LED of catenation sequence according to the order of connection, as, according to the series sequence of each LED, perhaps, the order of each LED of each interface channel parallel connection, detect the virtual voltage data of each LED respectively, and feed back to described processing unit.Detecting unit is connected to outside catenation sequence by a pin of described intelligent LED chip for driving, a catenation sequence can be the homochromy or heterochromatic LED of several parallel connections, or the homochromy or heterochromatic LED of several series connection, or the combined homochromy or heterochromatic LED of several parallel connection and serial connections.For example, detecting unit can be connected respectively to several catenation sequences by several pins of described intelligent LED chip for driving.
Described processing unit receives each described virtual voltage data of feedback, and according to described virtual voltage data, calculate the quantity of each LED of each interface channel series connection and the amplitude of required adjustment voltage, wherein, can be according to total output voltage of each interface channel, and the virtual voltage of each LED, calculate the quantity of each LED of each interface channel series connection, and according to standard operation voltage and its virtual voltage of each LED, calculate the amplitude of the required adjustment voltage of each LED of each interface channel series connection, and generate the adjustment output voltage data of each interface channel, and will adjust the output voltage data and send to described voltage conversion unit.
Wherein, described voltage conversion unit is connected with described processing unit, and described voltage conversion unit also is provided with one or more data-in ports, and each described data-in port is connected with the control device of outside, import described signal data by the control device of outside, wherein, described signal data is the signal data of each LED in each interface channel of driving, and, described signal data comprises information of voltage, the input voltage information of promptly described LED chip for driving.
And, described voltage conversion unit receives each the described adjustment output voltage data from described processing unit, and according to described adjustment output voltage data, change the voltage of the signal data that each described data-in port imports, wherein, when the driving voltage of relative each LED of the voltage of importing hangs down, low pressure can be converted to high pressure output, perhaps, when the driving voltage of relative each LED of the voltage of importing is higher, then high pressure can be converted to low pressure output, the voltage transitions that makes described signal data for required being consistent of normal working voltage of each LED of each passage that drives, and, the described signal data behind the changing voltage is sent to described driver element.
For example, described voltage conversion unit can comprise a step-down conversion subelement, a boost conversion subelement and a switch subelement, described switch subelement can be used to start described step-down conversion subelement and/or described boost conversion subelement, when the voltage of described signal data is higher than the normal working voltage of each LED, then described switch subelement is according to described adjustment output voltage data, start described step-down conversion subelement, satisfy the low voltage drive of each interface channel at a small amount of LED of series connection; Perhaps, when the voltage of described signal data is lower than the normal working voltage of each LED, then described switch subelement is according to described adjustment output voltage data, start described boost conversion subelement, thereby can be according to the actual needs of each LED that drives voltage with described signal data, be converted to high pressure or low pressure, satisfy the high voltage drive of each interface channel at the more LED of series connection, thereby make it can be according to the quantity of the LED of each interface channel series connection that drives, normally light each LED of each interface channel, make each LED can operate as normal.
After described driver element receives changing voltage, promptly boost or step-down after described signal data, and, adopt described signal data to drive each LED by each interface channel, each LED is lighted and according to pre-seting display video image.
Perhaps, described intelligent LED chip for driving can also comprise that one pre-sets the unit, the described unit that pre-sets is connected with described processing unit, pre-set the minimum voltage that the unit pre-sets each LED by described, it is the minimum power supply of lighting of each LED, because each LED quantity difference of each interface channel series connection, and, because when a plurality of LED of series connection, can there be voltage loss in series circuit, therefore, can be provided with and is in different interface channels by the described unit that pre-sets, different series connection or and the minimum voltage of the LED of column position, thereby change by voltage conversion unit, make described driver element when driving each interface channel, can reach the minimum voltage of each LED, thereby can light each LED by minimally, make each LED operate as normal under the state of minimum voltage, make its energy consumption reach minimum.
Perhaps, an example is that described processing unit also is provided with a fault output subelement and a judgment sub-unit; After described detecting unit detects the described virtual voltage data of each LED, described judgment sub-unit is used to also judge whether described virtual voltage data exceed default limiting value, promptly exceed minimum voltage limiting value or ceiling voltage limiting value that described LED bears, when when described virtual voltage data exceed described limiting value, then start described fault output subelement, and the error message of transmitting described virtual voltage data is exported subelement to described fault, wherein, described limiting value can be according to minimum voltage that bears or the ceiling voltage setting of each LED, when being no more than this limiting value, each LED can normally light work, when surpassing this limiting value, it is excessive that each LED may voltage take place, open circuit, burn out, spread of voltage shows, or there are faults such as loosening in circuit; Then described fault output subelement generates fault data and output, wherein according to the error message of described virtual voltage data, can export outside PC to and show, perhaps, export outside indicating member to and indicate, perhaps, export outside prewarning unit to and carry out early warning etc.
Perhaps, an example is, described processing unit also is provided with a feedback output end mouth, described processing unit can be connected with the display unit of outside by the described feedback output end mouth that is provided with, and export the described virtual voltage data of each LED in each interface channel by described feedback output end mouth, thereby the described virtual voltage data that can show each LED by the display unit of outside make the described virtual voltage data that can watch each LED at any time, thereby know the real-time display voltage situation of each LED.
Perhaps, another example is that described intelligent LED chip for driving also is provided with memory cell and PWM control unit; Wherein, described memory cell is used to store described limiting value, described adjustment output voltage data, described signal data, described memory cell plays the effect of buffer memory to each data, make in actual use and can transfer various data from described memory cell at any time, conveniently check or use each described limiting value its history or that using, each described adjustment output voltage data and each described signal data and, the described signal data of described PWM control unit after according to changing voltage generates pwm signal, described driver element is then according to described pwm signal, and drive each LED by each interface channel, make the display effect of each LED when showing each video image better.
Perhaps, described intelligent LED chip for driving also is provided with the cascade codec unit, described cascade codec unit is used for an intelligent LED chip for driving and next intelligent LED chip for driving signal data in the cascade, described signal data is in the process of transmission, described cascade codec unit can intercept its described input signal data that needs, and remaining input signal data sent to next intelligent LED chip for driving, so that a plurality of described intelligent LED chip for driving cascade mutually, to drive more LED, to form various LED display unit display video images.
Or, described intelligent LED chip for driving can also be the redundancy fault-tolerant chip for driving, be that described intelligence also is provided with the functions of redundancy and fault tolerance module, and, it comprises two or more data-in ports, each data-in port is redundant each other to be provided with, be that two or more data-in ports are imported identical redundant each other described signal data respectively, it selects correct trouble-free described signal data by the described functions of redundancy and fault tolerance module that is provided with, drive each outside LED, make the described signal data of described intelligent LED chip for driving have multiple assurance, use the driving of described signal data reliable and stable.
Need to prove that the mutual combination of above-mentioned each technical characterictic forms each embodiment, should be considered as the scope of specification record of the present invention.
Should be understood that, for those of ordinary skills, can be improved according to the above description or conversion, and all these improvement and conversion all should belong to the protection range of claims of the present invention.
Claims (10)
1. an intelligent LED chip for driving is characterized in that, comprises detecting unit, processing unit, voltage conversion unit and driver element;
Described detecting unit is connected with each LED by at least one interface channel, is used for detecting automatically the virtual voltage data of each each LED of interface channel, and feeds back to described processing unit;
Described processing unit is according to described virtual voltage data, calculates the quantity of each LED of each interface channel series connection and the amplitude of required adjustment voltage, generates the adjustment output voltage data of each interface channel, and sends to described voltage conversion unit;
Described voltage conversion unit is provided with at least one data-in port, is used for input signal data, wherein comprises information of voltage;
Described voltage conversion unit is according to described adjustment output voltage data, changes the voltage of the signal data that described data-in port imports, and the described signal data behind the changing voltage is sent to described driver element;
Described driver element drives each LED by each interface channel.
2. intelligent LED chip for driving according to claim 1 is characterized in that, comprises that also one pre-sets the unit, is connected with described processing unit, is used to pre-set the minimum voltage of each LED.
3. intelligent LED chip for driving according to claim 1, it is characterized in that, described detecting unit is connected with each LED of outside at least one catenation sequence by at least one interface channel, be used for detecting automatically the virtual voltage data of each each LED of catenation sequence, and feed back to described processing unit according to the order of connection.
4. intelligent LED chip for driving according to claim 1 is characterized in that, described interface channel comprises red LED interface channel, green LED interface channel and blue led interface channel, respectively by connection line and corresponding LED connection of all kinds.
5. according to the arbitrary described intelligent LED chip for driving of claim 1 to 4, it is characterized in that, described voltage conversion unit comprises a step-down conversion subelement, a boost conversion subelement and a switch subelement, be used for according to described adjustment output voltage data, start described step-down conversion subelement or described boost conversion subelement.
6. intelligent LED chip for driving according to claim 5 is characterized in that, described processing unit also is provided with a fault output subelement and a judgment sub-unit; Described judgment sub-unit is used for when described virtual voltage data exceed preset limit value, starts described fault output subelement, and the error message of transmitting described virtual voltage data is to described fault output subelement; Described fault output subelement is used for the error message according to described virtual voltage data, generates fault data and output.
7. intelligent LED chip for driving according to claim 6 is characterized in that, described processing unit also is provided with a feedback output end mouth, is used for exporting the described virtual voltage data that show each each LED of interface channel.
8. intelligent LED chip for driving according to claim 7 is characterized in that, memory cell and PWM control unit also are set; Described memory cell is used to store described preset limit value, described adjustment output voltage data, described signal data; The described signal data of described PWM control unit after according to changing voltage generates pwm signal, drives each LED by described driver element by each interface channel.
9. intelligent LED chip for driving according to claim 8, it is characterized in that, the cascade codec unit also is set, be used for an intelligent LED chip for driving and next intelligent LED chip for driving in the cascade, intercept the described input signal data that it needs, remaining input signal data is sent to next intelligent LED chip for driving.
10. intelligent LED chip for driving according to claim 8 is characterized in that, described intelligent LED chip for driving is the redundancy fault-tolerant chip for driving, and it comprises at least two data-in ports, and each data-in port is redundant each other to be provided with.
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| CN201110088411.7A CN102186288B (en) | 2011-04-08 | 2011-04-08 | Intelligent LED (Light Emitting Diode) driving chip |
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| CN201110088411.7A CN102186288B (en) | 2011-04-08 | 2011-04-08 | Intelligent LED (Light Emitting Diode) driving chip |
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| CN110572903A (en) * | 2019-08-28 | 2019-12-13 | 王雪燕 | LED power supply with constant current output |
| CN111698815A (en) * | 2020-05-14 | 2020-09-22 | 大茂伟瑞柯车灯有限公司 | LED voltage self-adaptation realized based on boost and buck integrated circuits |
| CN112908232A (en) * | 2021-03-26 | 2021-06-04 | 四川长虹电器股份有限公司 | LED multi-partition backlight fault detection system and fault judgment method |
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